package com.bwf.jdbc2;

import java.sql.SQLException;
import java.util.ArrayList;

public interface ClaDao {
    //查
    public ArrayList<Cla> list() throws Exception;

    //增
    public int insert(Cla cla) throws SQLException;

    //根据班级主键查询
    public Cla selectClaById(int classId) throws SQLException;
}
